Sewing machine



FIG. 1 is a perspective view of the first embodiment of a sewing machine showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is a perspective view of the second embodiment of the sewing machine.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for sewing machine, as shown and described. 